athena/system/device_socket_listener.h

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef ATHENA_SYSTEM_DEVICE_SOCKET_LISTENER_H_
   6 #define ATHENA_SYSTEM_DEVICE_SOCKET_LISTENER_H_
   7
   8 #include <string>
   9
  10 #include "base/basictypes.h"
  11 #include "base/memory/ref_counted.h"
  12
  13 namespace base {
  14 class TaskRunner;
  15 }
  16
  17 namespace athena {
  18
  19 // This class reads device-data from a socket.
  20 class DeviceSocketListener {
  21  public:
  22   DeviceSocketListener(const std::string& socket_parth,
  23                        size_t data_size);
  24   virtual ~DeviceSocketListener();
  25
  26   static void CreateSocketManager(
  27       scoped_refptr<base::TaskRunner> io_task_runner);
  28   static void ShutdownSocketManager();
  29
  30   // This is called on the FILE thread when data is available on the socket.
  31   // |data| is guaranteed to be of exactly |data_size| length. Note that the
  32   // implementation must not mutate or free the data.
  33   virtual void OnDataAvailableOnFILE(const void* data) = 0;
  34
  35  protected:
  36   void StartListening();
  37   void StopListening();
  38
  39  private:
  40   const std::string socket_path_;
  41   size_t data_size_;
  42
  43   DISALLOW_COPY_AND_ASSIGN(DeviceSocketListener);
  44 };
  45
  46 }  // namespace athena
  47
  48 #endif  // ATHENA_SYSTEM_DEVICE_SOCKET_LISTENER_H_